US20110287151A1 - Method for processing biomaterials - Google Patents
Method for processing biomaterials Download PDFInfo
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- US20110287151A1 US20110287151A1 US12/565,580 US56558009A US2011287151A1 US 20110287151 A1 US20110287151 A1 US 20110287151A1 US 56558009 A US56558009 A US 56558009A US 2011287151 A1 US2011287151 A1 US 2011287151A1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/005—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment
- A23L3/01—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/005—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
- H05B6/782—Arrangements for continuous movement of material wherein the material moved is food
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/80—Apparatus for specific applications
- H05B6/802—Apparatus for specific applications for heating fluids
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0391—Affecting flow by the addition of material or energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/6416—With heating or cooling of the system
- Y10T137/6606—With electric heating element
Definitions
- a method for thermal preservation of flowable heterogeneous biomaterials comprises continuously pumping heterogeneous materials through at least two applicators, wherein each of the at least two applicators comprise at least one port for entry and one port for exit of the heterogeneous materials and at least one port for entry and one port for exit of electromagnetic energy; and delivering electromagnetic energy to the at least two applicators while the heterogeneous materials are within at least one of the at least two applicators.
- a method for applying pressurization within an electromagnetic energy process comprises allowing conveyance of flowable materials from a electromagnetic system; providing a device to provide resistance to flow of material resulting in increased material pressure; arranging the device where material pressure exceeds pressure required to prevent vapor formation due to superheated conditions; and arranging the device such that the material pressure is reduced to prevent superheating of the materials.
- a method for applying pressurization within a continuous flow, electromagnetic energy process system containing discrete solids or particulate materials comprises utilizing static mixers within the cooling zones in a design to maximize clearances for decreased particulate degradation while providing resistance to flow; and utilizing the device for controlling flow of process materials to provide back pressurization while allowing particulate material pass to lower pressure zone with minimal damage.
- FIG. 1 illustrates a block diagram of a method for thermal preservation of heterogeneous foods and biomaterials according to one embodiment of the present invention.
- FIG. 2 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to one embodiment of the present invention.
- FIG. 3 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention.
- FIG. 4 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention.
- FIGS. 5-7 illustrates a solid particle flow distribution according to some embodiments of the present invention.
- FIG. 8 illustrates a block diagram of a method for thermal preservation of heterogeneous foods and biomaterials according to some embodiments of the present invention.
- FIG. 9 illustrates a cutaway view of static mixer design that may be implemented into the thermal processing system according to some embodiments of the present invention.
- FIG. 10 illustrates a cutaway view of another static mixer design that may be implemented into the thermal processing system according to other embodiments of the present invention.
- FIG. 11 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention
- FIG. 12 a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention.
- FIG. 1 illustrates a sequence of operations for thermal preservation of heterogeneous and multiphase foods using single or multi-stage exposure to electromagnetic energy under continuous flow conditions.
- the process may begin with ingredients and pre-treatments of the ingredients in making food materials and other biomaterials.
- the biomaterials may be heterogeneous materials, or materials which include materials of varying densities.
- a tank is pre-heated.
- the materials are loaded to a microwave system in order to heat or treat the materials loaded therein. Such heating may occur in several stages. These heating stages are illustrated and elaborated below regarding FIGS. 2 through 6 .
- FIG. 2 is a schematic outline of one of the embodiments of a heating stage of the process for thermal preservation of flowable heterogenous materials (foods or biomaterials) by exposure of the process material to electromagnetic energy under continuous flow conditions.
- Process materials enter the first applicator through process material entry port 1 with an average temperature of T 1 AVG, maximum temperature T 1 MAX, and a minimum temperature of T 1 MIN.
- electromagnetic energy is introduced into Applicator 1 through electromagnetic energy entry port 1 .
- Process material flows through a substantially horizontal conduit made of material or combination of materials transparent to electromagnetic energy. The horizontal flow is relative to ground or earth.
- Typical materials for fabrication of these conduits are ceramics (typically Alumina ceramic), glass (typically Borosilicate glass) and/or a variety of plastic polymers (Teflon, polypropylene, polysulfone, polyetheretherketone (PEEK), and polyetherimide (Ultem)
- ceramics typically Alumina ceramic
- glass typically Borosilicate glass
- plastic polymers Teflon, polypropylene, polysulfone, polyetheretherketone (PEEK), and polyetherimide (Ultem)
- This segment can be modified in conduit profile, diameter, geometry or equipped with static or active in-line mixing devices to improve the rate and extent of temperature equalization.
- this segment can also be insulated or heated conventionally (tube in tube heat exchanger).
- process material enters the second applicator with and average temperature of T 3 AVG, maximum temperature of T 3 MAX and minimum temperature of T 3 MIN, wherein the difference (T 3 MAX ⁇ T 3 MIN) is substantially lower than the difference (T 2 MAX ⁇ T 2 MIN).
- electromagnetic energy exiting from applicator 1 via electromagnetic energy exit port 1 is conveyed via a connecting waveguide into applicator 2 via electromagnetic energy entry port 2 .
- Energy density/intensity level entering applicator 2 is lower than energy level originally delivered from the generator into Applicator 1 through energy entry port 1 .
- Process material is further heated during conveyance through the second applicator—following material entry through material entry port 2 .
- Electromagnetic energy continues to be absorbed while the process material is exposed to its field while traveling through the second conduit constructed from a single or combination of multiple electromagnetic-energy transparent materials.
- transparent conduit placed within the second applicator can have a different material structure and composition, design, cross-sectional profile or diameter.
- process material temperatures are characterized by T 4 AVG, T 4 MIN and T 4 MAX temperature values wherein temperature differences T 4 AVG ⁇ T 3 AVG, T 4 MAX ⁇ T 3 MAX and T 4 MIN ⁇ T 3 MIN are preferably lower than respective temperature differences T 2 AVG ⁇ T 1 AVG, T 2 MAX ⁇ T 1 MAX and T 2 MIN ⁇ T 1 MIN.
- Temperature levels and temperature ranges in all segments within the process material exiting the final applicator stage are sufficiently high to achieve a pre-determined level of thermal preservation (pasteurization requiring subsequent refrigeration or sterilization resulting in long-term shelf stability at ambient temperatures of storage and distribution) in the least thermally treated segment of the material after being subjected to a sufficient hold treatment.
- the hold treatment is typically implemented by flowing the process material through a segment of non-heating cylindrical profile conduit segment long enough to achieve the predetermined level of product preservation.
- additional treatments and devices can be implemented between the process material exit from the final applicator exit port and entry into the hold segment—such as static or active agitating devices in order to accelerate the equalization of temperatures in the process material stream.
- FIG. 3 illustrates the 3-stage of heating for thermal preservation and/or sterilization of heterogeneous (particle containing) foods by heating under continuous flow exposure to electromagnetic energy.
- FIG. 4 illustrates the concept of heating for thermal preservation and/or sterilization of heterogeneous (particle containing) foods by heating under continuous flow exposure to electromagnetic energy.
- Process material (particle-containing food or biomaterial) is introduced into the electromagnetic energy exposure chamber via material entry port 1 and conveyed under continuous flow conditions through a microwave-transparent conduit C, fabricated from a single or combination of materials from a group of ceramics, glass and polymer materials with high temperature-resistant, high pressure-resistant characteristics.
- heterogeneous/particulate material is exposed to electromagnetic energy which is absorbed by product constituents to varying levels.
- Electromagnetic energy is introduced through port A, propagates through a metal-walled series of waveguides and single or multiple exposure chambers to terminate in a water load.
- the electromagnetic exposure chamber in FIG. 4 can be considered to represent a single or multiple chambers required to achieve the desired temperature levels throughout the heterogeneous process material components.
- Electromagnetic energy absorption and subsequent conversion to heat result in the increase of temperature of process material.
- the electromagnetic energy exposure chamber D or a series of similar exposure chambers are designed to allow for sufficient time and level of exposure of process material to enable the lowest heated element in the material to achieve the condition of commercial sterility (shelf stability under ambient storage conditions) in the processed heterogeneous (particle-containing) food or biomaterial. Exposure within the single or multiple chambers is used to achieve predetermined temperature levels in the process material, sufficient to impart commercial sterility to process material. These temperatures can range from approximately 70 C. to approximately 105 C. for high acid foods and biomaterials (e.g. fruits and products such as pickled vegetables, tomato dices and acidified salsa), and from approximately 110 C. to approximately 145 C.
- high acid foods and biomaterials e.g. fruits and products such as pickled vegetables, tomato dices and acidified salsa
- process material Upon exit from the final electromagnetic exposure chamber, process material will be passed through a tube segment sufficiently long to enable maintenance of the process material at or above the predetermined temperature level for a predetermined amount of time under continuous flow conditions.
- This tube segment is referred to herein as a hold tube.
- the lower the temperature at the exit of the hold tube the longer the hold tube will need to be, since the sterilization treatment to achieve commercial sterility is a thermal process implementing a predetermined temperature level treatment for a predetermined minimum amount of time. This combination of time and temperature treatment is required to thermally inactivate microorganisms which could potentially endanger health of consumers and/or spoilage of the product under typical conditions of storage and distribution.
- FIG. 5 is an illustration of microwave transparent tube with heterogeneous product, i.e. carrier fluid and individual particulate components with different density ranges continuously flowing through a substantially horizontal tube under the regime of uniform heating of the carrier fluid.
- heterogeneous product i.e. carrier fluid and individual particulate components with different density ranges continuously flowing through a substantially horizontal tube under the regime of uniform heating of the carrier fluid.
- any heterogeneous biomaterial, and especially foods containing particles will contain solid pieces with a range of density values. This is true even when there is a single solid component within the product (e.g. tomato dices in tomato juice or blueberries in blueberry juice) and more so with multiple solid components present (e.g. fruit salad in syrup or minestrone soup).
- particles that are at least 0.5% denser than the carrier fluid will tend to flow along the bottom segment of the tube (D), particles that are nearly identical in density to the carrier fluid are called neutral or neutrally buoyant (N) and tend to flow at locations throughout the tube cross section—bottom, top and center.
- buoyant Particles which have density at least 0.5% lower than the carrier fluid will tend to flow along the top of the tube and are marked as buoyant (B).
- buoyant As flow rates increase, flow conditions become more turbulent and locations of flow for greater range of particle densities become more distributed—i.e. denser particles tend to be lifted off the bottom and carried in the fluid stream and buoyant particles will also get mixed into other locations along the flow lines.
- Horizontal upward flow regime therefore tends to equalize residence time solid particles (single or multiple types) spend within a specific tube segment. Under other flow regimes (vertical upward or vertical downward) it would be impossible to maintain this equalization over a range of densities.
- FIG. 5B is a depiction of a process while heating a product containing dense, neutral and buoyant particle phases where the carrier fluid is being heated under continuous flow condition.
- a typical instance of this type of heating would be tube in tube heat exchangers or volumetric heating wherein the carrier fluid has properties that allow it to be heated preferentially (dielectric properties and thermo-physical properties such as low heat capacity and high heat diffusivity).
- temperature of carrier fluid increases which is accompanied by a decrease in its density. Since the solid particles carried within the fluid do not heat as rapidly, neither their temperature nor their density changes significantly for some time.
- FIG. 6 Stage 1 through Stage 3 .
- Stage 1 depicted by FIG. 6 is the early stage of heating—with buoyant particles flowing along the top of the tube, neutral particles occupying random locations along the cross section of the tube and dense particles flowing along the bottom.
- Stage 2 of FIG. 6 is the second stage of heating where the temperature of the carrier fluid has been raised enough and its density has been reduced enough to cause settling out (flow along the bottom) of the initially neutral particles while the density of initially buoyant particles still remains below the density of the carrier fluid and therefore they continue to flow predominately along the top segment of the tube.
- Stage 3 depicted by FIG. 6 is a stage where the carrier fluid temperature has been raised high enough for its density to fall below the density of the initially buoyant particles, causing this product component (B) to also fall out of suspension and flow along the bottom of the tube.
- initially dense (D) initially neutral (N) and initially buoyant (B) particles
- the flow will become stratified—dense particles (D) will flow slower (and have longer residence times) than initially neutral particles (N) which will in turn flow slower than the initially buoyant particles (B), provided the rate of change of their density values with temperature is equal or similar.
- FIG. 7 depicts stages 1 through 8 of heating of heterogeneous and multiphase materials during flow through a substantially horizontal microwave-transparent conduit under exposure to electromagnetic energy, with increased energy exposure and increased heating rates in the bottom segments of the conduit.
- Embodiments of the present invention provides a means to address the problem of density-base settling out of solid particulate food or biomaterial components in thermal processing of heterogeneous foods and biomaterials using electromagnetic energy heating under continuous flow conditions by application of electromagnetic energy.
- the key element of the invention is maintaining the preferential heating of process material along the bottom segment of the flow-through, microwave transparent conduit. This can be achieved by ensuring the electromagnetic energy field remains stronger in the bottom segment of the flow-through tube throughout its exposure to the field.
- This arrangement enables a self-regulating process of dynamic density changes for carrier fluid and solid components carried within it throughout the heating stages. This process of density change is elaborated in detail in FIG. 7 —Stage 1 through FIG. 7 —Stage 9 .
- Stage 1 of FIG. 7 shows the initial stage of heating—dense particles (D) flowing along the bottom, neutral particles (N) throughout the tube and buoyant particles (B) along the top of the tube.
- Process material enters the energy exposure chamber and preferential heating of the bottom segment of the flow is initiated, causing the reduction of carrier fluid density along the tube bottom.
- Stage 2 of FIG. 7 Carrier fluid temperature has been raised sufficiently and its density reduced sufficiently to fall below the density of the neutral particles (N), causing them to settle to the bottom segment of the tube during flow.
- Stage 3 of FIG. 7 Due to exposure to higher temperatures of the carrier fluid and higher energy field, initially dense (D) particle components are heated and their density reduced until it falls below the density of the carrier fluid and preferably below density of other solid/particulate components of the product.
- initially dense (D) particle components are heated and their density reduced until it falls below the density of the carrier fluid and preferably below density of other solid/particulate components of the product.
- Stage 4 of FIG. 7 Due to its reduction in density caused by heating, initially dense (D) particle population moves upward through the carrier fluid and other solid components to be lifted to the top, colder regions of the tube, and pushes the initially neutral (N) and initially buoyant (B) particle populations toward the center and bottom of the tube respectively. This causes mixing between the particles and carrier fluid and contributes to equalization of both residence time and thermal exposure of all product components.
- initially dense (D) particle population moves upward through the carrier fluid and other solid components to be lifted to the top, colder regions of the tube, and pushes the initially neutral (N) and initially buoyant (B) particle populations toward the center and bottom of the tube respectively. This causes mixing between the particles and carrier fluid and contributes to equalization of both residence time and thermal exposure of all product components.
- Stage 5 of FIG. 7 Initially neutral particles (N) flowing along the bottom segment of the tube get preferentially heated, reducing their density and causing their move back through the middle and to the top of the flow profile—as depicted by Stage 6 of FIG. 7 .
- Stage 6 of FIG. 7 Density of initially neutral particles, due to distribution of energy and temperature increase has been reduced sufficiently to cause their movement towards to top of the flow region.
- Stage 7 of FIG. 7 Initially neutral particles (N) move to the top while the initially dense segment starts losing some of the heat to the carrier fluid surrounding it in the top, colder, less heated region of the tube—resulting in the relative increase of their density compared to the carrier fluid component. Meanwhile, initially buoyant particle population segment flowing along the tube bottom is heated by carrier fluid and surrounding electromagnetic energy field and its density is decreased.
- Stage 8 of FIG. 7 Initially buoyant (B) solid component after heating at the bottom resulting in reduced density starts moving upward carried by the difference in density between it and the carrier fluid, while the initially dense (D) population starts falling out of the suspension towards the bottom of the flow due to higher density compared to the carrier fluid.
- Stage 1 of FIG. 7 where new materials are introduced into the tube and density—based spatial flow distribution is reconstituted—with the initial flow distribution of buoyant particles (B) flowing mostly along the top, neutral particles (N) flowing throughout the tube and dense particles (D) flowing along the bottom of the tube is reestablished.
- buoyant particles (B) flowing mostly along the top
- neutral particles (N) flowing throughout the tube
- dense particles (D) flowing along the bottom of the tube
- Both horizontal (caused by pumping) and vertical (top to bottom and bottom to top) flow during thermal exposure serve to equalize residence times and thermal exposure of all components contained within the product.
- Stage 1 of FIG. 7 also re-establishes conditions for the described process to be restarted and reiterated at a higher temperature level. In this manner, preferential heating along the tube bottom serves to not only equalize the treatment throughout the product but causes movement of all particles which in a heterogeneous product serve as miniature mixing devices assisting with this equalization.
- the thermal food processing process utilizes electromagnetic energy as the primary source of process material heating while maintaining continuous flow of process material from the initiation of the process until process termination requires innovative design components.
- the efficiency of this innovative thermal processing system causes the process material being pumped through the system to heat so rapidly that the total length has been significantly shortened. This shortening of the system length causes a reduction in natural back pressures inherently present within conventional thermal processes. The loss of this internal process pressure due to shortened length coupled with the process material being heated above 100 C. (boiling at standard atmospheric pressure) creates a situation where process material may “flash” or boil within the system piping.
- the superheated temperatures are required to achieve the process goals, thus higher pressures within the superheated zones are required to prevent flashing of the liquid phase to vapor.
- innovative design considerations must be utilized to establish a stable, controllable and predictable system.
- FIG. 8 illustrates the general flow of the system with components and functions described as:
- Material is pumpable or capable of moving through the system components in a controllable, consistent manner.
- Material to be processed may be homogeneous or heterogeneous, liquid, semi-solid or solid and may contain or be absent of discrete particles.
- Material may be in a completely natural, raw or non-processed state or may be processed or pre-treated to any degree.
- Material to be processed receives applied forces to establish continuous flow at a relatively constant rate throughout the entire system until termination of system flow requirements.
- Flow may be sufficiently consistent to maintain control within the operational parameters of the system as defined by the application.
- Flow may be established through the use of positive displacement pumps or pressurized systems with metered flow control. Multiple motive devices may be placed in series at determined intervals between the beginning and termination of flow to provide for staged or designed pressurization within the material conveyance system.
- the positive pumping characteristics or pressure-based force establishes an operational condition where downstream resistance to flow, whether artificial or natural to the system design, increases the process material pressure within the hermetic piping system. This internal pressure is highest at the discharge of the pump or pressure-based device and decreases as material flows toward the termination of the system.
- Material to be processed enters the Electromagnetic Energy Heating Zone where energy is applied and absorbed by the process material. Energy is converted to heat within the material creating the potential for superheated zones where temperature with insufficient pressure will result in “flashing” or the sudden conversion of liquid (i.e. water) to vapor (i.e. steam). These vapor “pockets” result in a loss of system control and predictability including, 1) increased volume of material thus reducing designed residence time within system components, 2) deposition of residue onto system surfaces, 3) physical changes or damage to process material, 4) undesirable cooling of process material, 5) loss of function of system components (i.e.- pumps or back pressure devices). Process material shall be at a predetermined temperature upon exiting the heating zone.
- the Thermal Hold Zone is a designed component of the process system, typically tubular, with a predetermined length and volume that yields a specific residence time for every particle of the process material at a given flow rate.
- the hold zone cannot be designed to contribute additional heating to the process material thus the temperature at the end of the hold zone shall be the same or lower than the temperature at the beginning of the hold zone. Temperatures within the hold zone may be of a superheated nature and thus, require sufficient pressure to remain in a non-vapor state as referenced in (C) above.
- the designed residence time and “end of hold” temperature serve as the legal thermal process of the system.
- Process materials may be formulated to change rheological properties such as thickening upon cooling thus providing resistance to flow and increasing up-stream system pressure.
- Flow restrictors may be designed in the cooling zone or non-cooling conveyance piping to provide friction drag for up-stream pressure creation. These devices may strictly be designed for resistance to flow or may be multifunctional such as creating turbulence within the cooling device for increased cooling efficiency.
- the process material Upon exiting the cooling device, the process material is no longer superheated to the level of requiring sufficient pressure to prevent “flashing;” however, a minimal pressure differential above the pressures external to the system is required in commercially aseptic processing. This nominal positive pressure differential is necessary to ensure that conditions for egress of internal process material exist and not ingress of external contamination into the system.
- Multiple types of Back Pressure Devices may be mounted after the exit of the cooling device to ensure all superheated areas within the cooling device are protected. These devices have a common characteristic of possessing a restrictive component to process material flow that is adjustable through spring tension, air pressure, hydraulic pressure, positioning device or other resistive force application. Once the process material passes the back pressure device, the resulting pressure is controlled by the filler system, receiving surge tanks or a system exit valve, marking the end of the continuous process.
- the final components of the continuous process system will be a filler(s), storage or surge tank(s) or a combination of the two functions.
- the termination of the continuous process system may be fillers only with any material not filled exiting the system though a final device that acts as the back pressure device for the lower (filling) pressure zone.
- Surge tanks may be located before the filler systems or after the fillers as the termination point at the end of continuous flow.
- One single surge tank shall be maintained at the lower (filling) pressure allowing product to freely flow from the process system supply or to the filling systems.
- multiple surge tank systems can be utilized as controlling devices for both high and low pressure zones by isolating one tank and pressurizing to the higher level and acting as a receiver tank. At a predetermined point, another tank may act as the receiver tank and the initial tank pressure is lowered to filling pressure and dedicated to filling only.
- FIG. 12 depicts one embodiment of the utilization of an existing apparatus, where a static mixer is placed within the described continuous flow electromagnetic thermal processing system ( FIG. 11B ) to attain desired back pressure within the process.
- Examples of static mixers are illustrated in FIGS. 9 and 10 .
- An increase in frictional pressure caused by the use of a static mixer within a flowing system should be minimized.
- the utilization of static mixers are often reduced or avoided completely due to the addition frictional drag to the system.
- the unique characteristic of the electromagnetic thermal process system where the length has been dramatically shortened due to more efficient heating creates an absence of natural system pressurization as compared to conventional thermal systems. This loss of pressurization when coupled with superheated zones of process material allows vaporization of liquids to gasses, thus rendering the process uncontrollable.
- static mixers creates significant and quantifiable pressure increases upstream of their location. These devices may provide secondary process improvements through the creation of forced turbulence within the fluid flow on the continuous system or the devices may only benefit the process through added back pressure. It should be noted that “back pressure” refers to applying a force to the materials in a direction that is opposite of the flow of the material.
- back pressure refers to applying a force to the materials in a direction that is opposite of the flow of the material.
- the insertion of one or more static mixers after the end of the Thermal Hold (ref. FIG. 12 ) and within the cooling device or any point before the filler and/or surge tank portion of the process will provide additional back pressure within the system to maintain control of the fluid phase material in the superheated zones.
- a conscious design must be applied to quantify the pressure increase considering flow rate, process material physical characteristics, temperature, device type and length, process equipment dimensions and location.
- the utilization within the cooling device provides secondary benefits of induced turbulence resulting in a reduced boundary layer at the cooling surface, thus improving the efficiency of cooling.
- Use of the static mixers allows for larger clearances within the cooling device, thus creating conditions that are induce less shear and mechanical stresses to the process material.
- FIG. 13 depicts the utilization of smaller diameter piping within the described continuous flow electromagnetic thermal processing system ( FIG. 11C ) to attain desired back pressure within the process.
- the smaller piping creates more friction drag thus resulting in an increased back pressure within the system.
- the device may be placed after the cooling zone or may be designed to be within the cooling zone.
- FIG. 11D depicts the utilization of an existing apparatus, a Back Pressure Valve, within the described continuous flow electromagnetic thermal processing system to attain desired back pressure within the process.
- the Back Pressure Valve should be located after the cooling device due to its nature of design.
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Abstract
Description
- This application claims benefit of priority under 35 U.S.C. §119(e) to the filing date of U.S. Provisional Application No. 61/099,434, as filed on Oct. 23, 2008, which is incorporated herein by reference in its entirety.
- There is need for thermal preservation (sterilization) of heterogeneous and multiphase foods and biomaterials in order to achieve long shelf stability at ambient level temperatures. Methods are needed to effectively heat flowing heterogeneous and multiphase foods and biomaterials.
- In one embodiment, a method for thermal preservation of flowable heterogeneous biomaterials, comprises continuously pumping heterogeneous materials through at least two applicators, wherein each of the at least two applicators comprise at least one port for entry and one port for exit of the heterogeneous materials and at least one port for entry and one port for exit of electromagnetic energy; and delivering electromagnetic energy to the at least two applicators while the heterogeneous materials are within at least one of the at least two applicators.
- In another embodiment, a method for applying pressurization within an electromagnetic energy process comprises allowing conveyance of flowable materials from a electromagnetic system; providing a device to provide resistance to flow of material resulting in increased material pressure; arranging the device where material pressure exceeds pressure required to prevent vapor formation due to superheated conditions; and arranging the device such that the material pressure is reduced to prevent superheating of the materials.
- In another embodiment, a method for applying pressurization within a continuous flow, electromagnetic energy process system containing discrete solids or particulate materials comprises utilizing static mixers within the cooling zones in a design to maximize clearances for decreased particulate degradation while providing resistance to flow; and utilizing the device for controlling flow of process materials to provide back pressurization while allowing particulate material pass to lower pressure zone with minimal damage.
- In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, embodiments of the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which:
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FIG. 1 illustrates a block diagram of a method for thermal preservation of heterogeneous foods and biomaterials according to one embodiment of the present invention. -
FIG. 2 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to one embodiment of the present invention. -
FIG. 3 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention. -
FIG. 4 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention. -
FIGS. 5-7 illustrates a solid particle flow distribution according to some embodiments of the present invention. -
FIG. 8 illustrates a block diagram of a method for thermal preservation of heterogeneous foods and biomaterials according to some embodiments of the present invention. -
FIG. 9 illustrates a cutaway view of static mixer design that may be implemented into the thermal processing system according to some embodiments of the present invention. -
FIG. 10 illustrates a cutaway view of another static mixer design that may be implemented into the thermal processing system according to other embodiments of the present invention. -
FIG. 11 illustrates a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention -
FIG. 12 a system for thermal preservation of heterogeneous foods and biomaterials according to another embodiment of the present invention. - Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
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FIG. 1 illustrates a sequence of operations for thermal preservation of heterogeneous and multiphase foods using single or multi-stage exposure to electromagnetic energy under continuous flow conditions. The process may begin with ingredients and pre-treatments of the ingredients in making food materials and other biomaterials. The biomaterials may be heterogeneous materials, or materials which include materials of varying densities. As illustrated a tank is pre-heated. The materials are loaded to a microwave system in order to heat or treat the materials loaded therein. Such heating may occur in several stages. These heating stages are illustrated and elaborated below regardingFIGS. 2 through 6 . -
FIG. 2 is a schematic outline of one of the embodiments of a heating stage of the process for thermal preservation of flowable heterogenous materials (foods or biomaterials) by exposure of the process material to electromagnetic energy under continuous flow conditions. Process materials enter the first applicator through processmaterial entry port 1 with an average temperature of T1AVG, maximum temperature T1MAX, and a minimum temperature of T1MIN. Concurrently, electromagnetic energy is introduced intoApplicator 1 through electromagneticenergy entry port 1. Process material flows through a substantially horizontal conduit made of material or combination of materials transparent to electromagnetic energy. The horizontal flow is relative to ground or earth. - Typical materials for fabrication of these conduits are ceramics (typically Alumina ceramic), glass (typically Borosilicate glass) and/or a variety of plastic polymers (Teflon, polypropylene, polysulfone, polyetheretherketone (PEEK), and polyetherimide (Ultem)
- During the flow through the transparent conduit within the first applicator the first increment of temperature increase of the process material is realized. By the time process material exits the first applicator its average temperature has increased to T2AVG, its minimum temperature to T2MIN and its maximum temperature to T2MAX. Concurrently, part of the electromagnetic energy which has entered
Applicator 1 is absorbed by the process material and converted to heat. Energy field density of electromagnetic energy exiting the first applicator (at electromagnetic energy exit port 1) and entering the second applicator has been reduced by the amount of energy absorbed by the process material. Following exit fromApplicator 1, process material is conveyed through a segment of conduit placed outside of the of electromagnetic field exposure. This segment can be modified in conduit profile, diameter, geometry or equipped with static or active in-line mixing devices to improve the rate and extent of temperature equalization. Optionally, this segment can also be insulated or heated conventionally (tube in tube heat exchanger). Following temperature equalization outside of electromagnetic energy exposure region, process material enters the second applicator with and average temperature of T3AVG, maximum temperature of T3MAX and minimum temperature of T3MIN, wherein the difference (T3MAX−T3MIN) is substantially lower than the difference (T2MAX−T2MIN). Concurrently, electromagnetic energy exiting fromapplicator 1 via electromagneticenergy exit port 1 is conveyed via a connecting waveguide intoapplicator 2 via electromagneticenergy entry port 2. Energy density/intensitylevel entering applicator 2 is lower than energy level originally delivered from the generator intoApplicator 1 throughenergy entry port 1. - Process material is further heated during conveyance through the second applicator—following material entry through
material entry port 2. Electromagnetic energy continues to be absorbed while the process material is exposed to its field while traveling through the second conduit constructed from a single or combination of multiple electromagnetic-energy transparent materials. - Optionally, transparent conduit placed within the second applicator can have a different material structure and composition, design, cross-sectional profile or diameter. Exiting from the second applicator, process material temperatures are characterized by T4AVG, T4MIN and T4MAX temperature values wherein temperature differences T4AVG−T3AVG, T4MAX−T3MAX and T4MIN−T3MIN are preferably lower than respective temperature differences T2AVG−T1AVG, T2MAX−T1MAX and T2MIN−T1MIN.
- Electromagnetic energy exits the second applicator with further reduced energy density level and is optionally conveyed into the next entry port of another Applicator or terminated with a water load.
- Temperature levels and temperature ranges in all segments within the process material exiting the final applicator stage are sufficiently high to achieve a pre-determined level of thermal preservation (pasteurization requiring subsequent refrigeration or sterilization resulting in long-term shelf stability at ambient temperatures of storage and distribution) in the least thermally treated segment of the material after being subjected to a sufficient hold treatment.
- The hold treatment is typically implemented by flowing the process material through a segment of non-heating cylindrical profile conduit segment long enough to achieve the predetermined level of product preservation. Optionally, additional treatments and devices can be implemented between the process material exit from the final applicator exit port and entry into the hold segment—such as static or active agitating devices in order to accelerate the equalization of temperatures in the process material stream.
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FIG. 3 illustrates the 3-stage of heating for thermal preservation and/or sterilization of heterogeneous (particle containing) foods by heating under continuous flow exposure to electromagnetic energy. -
FIG. 4 illustrates the concept of heating for thermal preservation and/or sterilization of heterogeneous (particle containing) foods by heating under continuous flow exposure to electromagnetic energy. - Process material (particle-containing food or biomaterial) is introduced into the electromagnetic energy exposure chamber via
material entry port 1 and conveyed under continuous flow conditions through a microwave-transparent conduit C, fabricated from a single or combination of materials from a group of ceramics, glass and polymer materials with high temperature-resistant, high pressure-resistant characteristics. - During the passage through the microwave-transparent conduit C, heterogeneous/particulate material is exposed to electromagnetic energy which is absorbed by product constituents to varying levels. Electromagnetic energy is introduced through port A, propagates through a metal-walled series of waveguides and single or multiple exposure chambers to terminate in a water load. The electromagnetic exposure chamber in
FIG. 4 can be considered to represent a single or multiple chambers required to achieve the desired temperature levels throughout the heterogeneous process material components. - Electromagnetic energy absorption and subsequent conversion to heat result in the increase of temperature of process material. The electromagnetic energy exposure chamber D, or a series of similar exposure chambers are designed to allow for sufficient time and level of exposure of process material to enable the lowest heated element in the material to achieve the condition of commercial sterility (shelf stability under ambient storage conditions) in the processed heterogeneous (particle-containing) food or biomaterial. Exposure within the single or multiple chambers is used to achieve predetermined temperature levels in the process material, sufficient to impart commercial sterility to process material. These temperatures can range from approximately 70 C. to approximately 105 C. for high acid foods and biomaterials (e.g. fruits and products such as pickled vegetables, tomato dices and acidified salsa), and from approximately 110 C. to approximately 145 C. for low acid foods and biomaterials (chunky soups, stews, cheese sauces with particles etc). Upon exit from the final electromagnetic exposure chamber, process material will be passed through a tube segment sufficiently long to enable maintenance of the process material at or above the predetermined temperature level for a predetermined amount of time under continuous flow conditions. This tube segment is referred to herein as a hold tube. Typically, the lower the temperature at the exit of the hold tube, the longer the hold tube will need to be, since the sterilization treatment to achieve commercial sterility is a thermal process implementing a predetermined temperature level treatment for a predetermined minimum amount of time. This combination of time and temperature treatment is required to thermally inactivate microorganisms which could potentially endanger health of consumers and/or spoilage of the product under typical conditions of storage and distribution.
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FIG. 5 is an illustration of microwave transparent tube with heterogeneous product, i.e. carrier fluid and individual particulate components with different density ranges continuously flowing through a substantially horizontal tube under the regime of uniform heating of the carrier fluid. - Any heterogeneous biomaterial, and especially foods containing particles (e.g., fluid with chucks), will contain solid pieces with a range of density values. This is true even when there is a single solid component within the product (e.g. tomato dices in tomato juice or blueberries in blueberry juice) and more so with multiple solid components present (e.g. fruit salad in syrup or minestrone soup). At lower flow rates (laminar flow conditions) particles that are at least 0.5% denser than the carrier fluid will tend to flow along the bottom segment of the tube (D), particles that are nearly identical in density to the carrier fluid are called neutral or neutrally buoyant (N) and tend to flow at locations throughout the tube cross section—bottom, top and center. Particles which have density at least 0.5% lower than the carrier fluid will tend to flow along the top of the tube and are marked as buoyant (B). As flow rates increase, flow conditions become more turbulent and locations of flow for greater range of particle densities become more distributed—i.e. denser particles tend to be lifted off the bottom and carried in the fluid stream and buoyant particles will also get mixed into other locations along the flow lines. Horizontal upward flow regime therefore tends to equalize residence time solid particles (single or multiple types) spend within a specific tube segment. Under other flow regimes (vertical upward or vertical downward) it would be impossible to maintain this equalization over a range of densities.
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FIG. 5B is a depiction of a process while heating a product containing dense, neutral and buoyant particle phases where the carrier fluid is being heated under continuous flow condition. A typical instance of this type of heating would be tube in tube heat exchangers or volumetric heating wherein the carrier fluid has properties that allow it to be heated preferentially (dielectric properties and thermo-physical properties such as low heat capacity and high heat diffusivity). As the product flows from entry port, through the tube and out of the exit port (from right to left inFIG. 5 A), temperature of carrier fluid increases which is accompanied by a decrease in its density. Since the solid particles carried within the fluid do not heat as rapidly, neither their temperature nor their density changes significantly for some time. The gradual reduction of density of the carrier fluid caused by heating without the concurrent reduction of density of particles can lead to the situation shown in the left-hand side ofFIG. 5B , i.e. all contained solid components (initially dense, neutral and buoyant) can end up flowing along the bottom of the tube due to having higher densities than the carrier fluid in some segments of process during heating. - FIG. 6—
Stage 1 throughStage 3.Stage 1 depicted byFIG. 6 is the early stage of heating—with buoyant particles flowing along the top of the tube, neutral particles occupying random locations along the cross section of the tube and dense particles flowing along the bottom.Stage 2 of FIG. 6—is the second stage of heating where the temperature of the carrier fluid has been raised enough and its density has been reduced enough to cause settling out (flow along the bottom) of the initially neutral particles while the density of initially buoyant particles still remains below the density of the carrier fluid and therefore they continue to flow predominately along the top segment of the tube. - Finally
Stage 3 depicted byFIG. 6 is a stage where the carrier fluid temperature has been raised high enough for its density to fall below the density of the initially buoyant particles, causing this product component (B) to also fall out of suspension and flow along the bottom of the tube. Within the population of initially dense (D), initially neutral (N) and initially buoyant (B) particles, the flow will become stratified—dense particles (D) will flow slower (and have longer residence times) than initially neutral particles (N) which will in turn flow slower than the initially buoyant particles (B), provided the rate of change of their density values with temperature is equal or similar. - When such stratified product flow is subjected to heating, and especially volumetric heating using electromagnetic energy under continuous flow conditions, this can result in wide differences in residence times within the heating segments of the process (i.e. energy exposure chamber), resulting in significantly different extents of time and temperature exposure for different solid components. With the fastest moving component the risk is to have it under-processed due to insufficient residence time spent within the energy exposure segments of the process —and have a potential health hazard to the consumer. With the slowest moving component the risk is to over-heat and therefore over-process that component resulting in excessive quality reduction and loss caused by thermal over-treatment.
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FIG. 7 depictsstages 1 through 8 of heating of heterogeneous and multiphase materials during flow through a substantially horizontal microwave-transparent conduit under exposure to electromagnetic energy, with increased energy exposure and increased heating rates in the bottom segments of the conduit. - Embodiments of the present invention provides a means to address the problem of density-base settling out of solid particulate food or biomaterial components in thermal processing of heterogeneous foods and biomaterials using electromagnetic energy heating under continuous flow conditions by application of electromagnetic energy. The key element of the invention is maintaining the preferential heating of process material along the bottom segment of the flow-through, microwave transparent conduit. This can be achieved by ensuring the electromagnetic energy field remains stronger in the bottom segment of the flow-through tube throughout its exposure to the field. This arrangement enables a self-regulating process of dynamic density changes for carrier fluid and solid components carried within it throughout the heating stages. This process of density change is elaborated in detail in FIG. 7—
Stage 1 through FIG. 7—Stage 9. -
Stage 1 ofFIG. 7 shows the initial stage of heating—dense particles (D) flowing along the bottom, neutral particles (N) throughout the tube and buoyant particles (B) along the top of the tube. Process material enters the energy exposure chamber and preferential heating of the bottom segment of the flow is initiated, causing the reduction of carrier fluid density along the tube bottom. -
Stage 2 of FIG. 7—Carrier fluid temperature has been raised sufficiently and its density reduced sufficiently to fall below the density of the neutral particles (N), causing them to settle to the bottom segment of the tube during flow. -
Stage 3 of FIG. 7—Due to exposure to higher temperatures of the carrier fluid and higher energy field, initially dense (D) particle components are heated and their density reduced until it falls below the density of the carrier fluid and preferably below density of other solid/particulate components of the product. -
Stage 4 of FIG. 7—Due to its reduction in density caused by heating, initially dense (D) particle population moves upward through the carrier fluid and other solid components to be lifted to the top, colder regions of the tube, and pushes the initially neutral (N) and initially buoyant (B) particle populations toward the center and bottom of the tube respectively. This causes mixing between the particles and carrier fluid and contributes to equalization of both residence time and thermal exposure of all product components. -
Stage 5 of FIG. 7—Initially neutral particles (N) flowing along the bottom segment of the tube get preferentially heated, reducing their density and causing their move back through the middle and to the top of the flow profile—as depicted byStage 6 ofFIG. 7 . -
Stage 6 of FIG. 7—Density of initially neutral particles, due to distribution of energy and temperature increase has been reduced sufficiently to cause their movement towards to top of the flow region. -
Stage 7 of FIG. 7—Initially neutral particles (N) move to the top while the initially dense segment starts losing some of the heat to the carrier fluid surrounding it in the top, colder, less heated region of the tube—resulting in the relative increase of their density compared to the carrier fluid component. Meanwhile, initially buoyant particle population segment flowing along the tube bottom is heated by carrier fluid and surrounding electromagnetic energy field and its density is decreased. -
Stage 8 of FIG. 7—Initially buoyant (B) solid component after heating at the bottom resulting in reduced density starts moving upward carried by the difference in density between it and the carrier fluid, while the initially dense (D) population starts falling out of the suspension towards the bottom of the flow due to higher density compared to the carrier fluid. - Finally the process starts over again with
Stage 1 ofFIG. 7 where new materials are introduced into the tube and density—based spatial flow distribution is reconstituted—with the initial flow distribution of buoyant particles (B) flowing mostly along the top, neutral particles (N) flowing throughout the tube and dense particles (D) flowing along the bottom of the tube is reestablished. Both horizontal (caused by pumping) and vertical (top to bottom and bottom to top) flow during thermal exposure serve to equalize residence times and thermal exposure of all components contained within the product.Stage 1 ofFIG. 7 also re-establishes conditions for the described process to be restarted and reiterated at a higher temperature level. In this manner, preferential heating along the tube bottom serves to not only equalize the treatment throughout the product but causes movement of all particles which in a heterogeneous product serve as miniature mixing devices assisting with this equalization. - The thermal food processing process utilizes electromagnetic energy as the primary source of process material heating while maintaining continuous flow of process material from the initiation of the process until process termination requires innovative design components. The efficiency of this innovative thermal processing system causes the process material being pumped through the system to heat so rapidly that the total length has been significantly shortened. This shortening of the system length causes a reduction in natural back pressures inherently present within conventional thermal processes. The loss of this internal process pressure due to shortened length coupled with the process material being heated above 100 C. (boiling at standard atmospheric pressure) creates a situation where process material may “flash” or boil within the system piping. The superheated temperatures are required to achieve the process goals, thus higher pressures within the superheated zones are required to prevent flashing of the liquid phase to vapor. Innovative design considerations must be utilized to establish a stable, controllable and predictable system.
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FIG. 8 illustrates the general flow of the system with components and functions described as: - A. Material to be Processed.
- Material is pumpable or capable of moving through the system components in a controllable, consistent manner. Material to be processed may be homogeneous or heterogeneous, liquid, semi-solid or solid and may contain or be absent of discrete particles. Material may be in a completely natural, raw or non-processed state or may be processed or pre-treated to any degree.
- B. Continuous Flow Pump or Motive Device.
- Material to be processed receives applied forces to establish continuous flow at a relatively constant rate throughout the entire system until termination of system flow requirements. Flow may be sufficiently consistent to maintain control within the operational parameters of the system as defined by the application. Flow may be established through the use of positive displacement pumps or pressurized systems with metered flow control. Multiple motive devices may be placed in series at determined intervals between the beginning and termination of flow to provide for staged or designed pressurization within the material conveyance system. The positive pumping characteristics or pressure-based force establishes an operational condition where downstream resistance to flow, whether artificial or natural to the system design, increases the process material pressure within the hermetic piping system. This internal pressure is highest at the discharge of the pump or pressure-based device and decreases as material flows toward the termination of the system.
- C. Electromagnetic Energy Heating Zone.
- Material to be processed enters the Electromagnetic Energy Heating Zone where energy is applied and absorbed by the process material. Energy is converted to heat within the material creating the potential for superheated zones where temperature with insufficient pressure will result in “flashing” or the sudden conversion of liquid (i.e. water) to vapor (i.e. steam). These vapor “pockets” result in a loss of system control and predictability including, 1) increased volume of material thus reducing designed residence time within system components, 2) deposition of residue onto system surfaces, 3) physical changes or damage to process material, 4) undesirable cooling of process material, 5) loss of function of system components (i.e.- pumps or back pressure devices). Process material shall be at a predetermined temperature upon exiting the heating zone.
- D. Thermal Hold Zone.
- The Thermal Hold Zone is a designed component of the process system, typically tubular, with a predetermined length and volume that yields a specific residence time for every particle of the process material at a given flow rate. The hold zone cannot be designed to contribute additional heating to the process material thus the temperature at the end of the hold zone shall be the same or lower than the temperature at the beginning of the hold zone. Temperatures within the hold zone may be of a superheated nature and thus, require sufficient pressure to remain in a non-vapor state as referenced in (C) above. The designed residence time and “end of hold” temperature serve as the legal thermal process of the system.
- E. Cooling Device.
- Once the process material exits the Thermal Hold Zone, the desired thermal process has been delivered and it is typically desirable to cool the process material quickly. The process material enters the cooling device but is still in a superheated state thus, continues to require sufficient pressure to remain in a non-vapor state. Multiple design and device components may be integrated within the cooling device to satisfy the system pressure requirements. Process materials may be formulated to change rheological properties such as thickening upon cooling thus providing resistance to flow and increasing up-stream system pressure. Flow restrictors may be designed in the cooling zone or non-cooling conveyance piping to provide friction drag for up-stream pressure creation. These devices may strictly be designed for resistance to flow or may be multifunctional such as creating turbulence within the cooling device for increased cooling efficiency.
- F. Back Pressure Device.
- Upon exiting the cooling device, the process material is no longer superheated to the level of requiring sufficient pressure to prevent “flashing;” however, a minimal pressure differential above the pressures external to the system is required in commercially aseptic processing. This nominal positive pressure differential is necessary to ensure that conditions for egress of internal process material exist and not ingress of external contamination into the system. Multiple types of Back Pressure Devices may be mounted after the exit of the cooling device to ensure all superheated areas within the cooling device are protected. These devices have a common characteristic of possessing a restrictive component to process material flow that is adjustable through spring tension, air pressure, hydraulic pressure, positioning device or other resistive force application. Once the process material passes the back pressure device, the resulting pressure is controlled by the filler system, receiving surge tanks or a system exit valve, marking the end of the continuous process.
- G. Filler and/or Surge Tanks.
- The final components of the continuous process system will be a filler(s), storage or surge tank(s) or a combination of the two functions. The termination of the continuous process system may be fillers only with any material not filled exiting the system though a final device that acts as the back pressure device for the lower (filling) pressure zone. Surge tanks may be located before the filler systems or after the fillers as the termination point at the end of continuous flow. One single surge tank shall be maintained at the lower (filling) pressure allowing product to freely flow from the process system supply or to the filling systems. However, multiple surge tank systems can be utilized as controlling devices for both high and low pressure zones by isolating one tank and pressurizing to the higher level and acting as a receiver tank. At a predetermined point, another tank may act as the receiver tank and the initial tank pressure is lowered to filling pressure and dedicated to filling only.
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FIG. 12 depicts one embodiment of the utilization of an existing apparatus, where a static mixer is placed within the described continuous flow electromagnetic thermal processing system (FIG. 11B ) to attain desired back pressure within the process. Examples of static mixers are illustrated inFIGS. 9 and 10 . An increase in frictional pressure caused by the use of a static mixer within a flowing system should be minimized. The utilization of static mixers are often reduced or avoided completely due to the addition frictional drag to the system. However, the unique characteristic of the electromagnetic thermal process system where the length has been dramatically shortened due to more efficient heating creates an absence of natural system pressurization as compared to conventional thermal systems. This loss of pressurization when coupled with superheated zones of process material allows vaporization of liquids to gasses, thus rendering the process uncontrollable. The addition of static mixers creates significant and quantifiable pressure increases upstream of their location. These devices may provide secondary process improvements through the creation of forced turbulence within the fluid flow on the continuous system or the devices may only benefit the process through added back pressure. It should be noted that “back pressure” refers to applying a force to the materials in a direction that is opposite of the flow of the material. The insertion of one or more static mixers after the end of the Thermal Hold (ref.FIG. 12 ) and within the cooling device or any point before the filler and/or surge tank portion of the process will provide additional back pressure within the system to maintain control of the fluid phase material in the superheated zones. A conscious design must be applied to quantify the pressure increase considering flow rate, process material physical characteristics, temperature, device type and length, process equipment dimensions and location. - The utilization within the cooling device provides secondary benefits of induced turbulence resulting in a reduced boundary layer at the cooling surface, thus improving the efficiency of cooling. Use of the static mixers allows for larger clearances within the cooling device, thus creating conditions that are induce less shear and mechanical stresses to the process material.
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FIG. 13 depicts the utilization of smaller diameter piping within the described continuous flow electromagnetic thermal processing system (FIG. 11C ) to attain desired back pressure within the process. The smaller piping creates more friction drag thus resulting in an increased back pressure within the system. The device may be placed after the cooling zone or may be designed to be within the cooling zone. -
FIG. 11D depicts the utilization of an existing apparatus, a Back Pressure Valve, within the described continuous flow electromagnetic thermal processing system to attain desired back pressure within the process. The Back Pressure Valve should be located after the cooling device due to its nature of design. - Embodiments of the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (21)
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US20150044336A1 (en) * | 2013-08-06 | 2015-02-12 | Aseptia, Inc. | Processing of cranberry food product into aseptic packaging |
US9066376B2 (en) | 2012-03-14 | 2015-06-23 | Microwave Materials Technologies, Inc. | Locking gate device |
US20150296825A1 (en) * | 2014-04-21 | 2015-10-22 | Johnson Industries International, Inc. | Use of electromagnetic energy for making pasta filata cheese |
US10334870B2 (en) | 2010-10-07 | 2019-07-02 | Tropicana Products, Inc. | Processing of whole fruits and vegetables, processing of side-stream ingredients of fruits and vegetables, and use of the processed fruits and vegetables in beverage and food products |
US10667546B2 (en) | 2013-02-15 | 2020-06-02 | Pepsico, Inc. | Preparation and incorporation of co-products into beverages to enhance nutrition and sensory attributes |
US10966293B2 (en) | 2017-04-17 | 2021-03-30 | 915 Labs, LLC | Microwave-assisted sterilization and pasteurization system using synergistic packaging, carrier and launcher configurations |
US11032879B2 (en) | 2017-03-15 | 2021-06-08 | 915 Labs, Inc. | Energy control elements for improved microwave heating of packaged articles |
US20210204570A1 (en) * | 2017-12-26 | 2021-07-08 | Puratos N.V. | Methods for heating compositions comprising edible inclusions |
US11129243B2 (en) | 2017-03-15 | 2021-09-21 | 915 Labs, Inc. | Multi-pass microwave heating system |
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Publication number | Priority date | Publication date | Assignee | Title |
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US11559070B2 (en) | 2017-05-09 | 2023-01-24 | Gea Mechanical Equipment Gmbh | Apparatus and method to heat animal raw fat material to produce fat |
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Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3535482A (en) * | 1968-06-26 | 1970-10-20 | Hammtronics Systems Inc | Microwave apparatus for rapid heating of fluids |
US3577322A (en) * | 1968-12-03 | 1971-05-04 | Stephen J Nesbitt | Microwave heating in the desalination of water |
US3706631A (en) * | 1970-10-08 | 1972-12-19 | John D Falk | Sterilization of protein-containing fluids |
US3710063A (en) * | 1971-05-25 | 1973-01-09 | H Aine | Microwave applicator |
US3843860A (en) * | 1971-12-16 | 1974-10-22 | Varian Associates | Twisted microwave applicator |
US4208806A (en) * | 1978-07-30 | 1980-06-24 | Gebrueder Buehler Ag | Process for treatment of pourable materials with microwaves |
US4237145A (en) * | 1978-02-03 | 1980-12-02 | Husqvarna Aktiebolag | Method of preparing foodstuffs containing coagulating proteins and a device for performing the method |
US4284869A (en) * | 1980-03-06 | 1981-08-18 | Pinkstaff Leo W | Microwave water heater |
US4640840A (en) * | 1984-05-08 | 1987-02-03 | Thomas J. Lipton, Inc. | Food processing method to avoid non-enzymatic browning |
US4975246A (en) * | 1985-09-30 | 1990-12-04 | Charm Stanley E | High temperature, short time heating system and method of heating heat-sensitive material |
US5080164A (en) * | 1987-11-24 | 1992-01-14 | Stork Amsterdam B.V. | Process and device for heat treatment in continuous flow of a product mixture consisting of a liquid containing solid particulates |
US5389335A (en) * | 1993-06-18 | 1995-02-14 | Charm Sciences, Inc. | High temperature, short time microwave heating system and method of heating heat-sensitive material |
US5403564A (en) * | 1993-05-05 | 1995-04-04 | Helmut Katschnig | Apparatus for heating and thermal decontaminating a pumpable or pourable material |
US5514389A (en) * | 1994-10-13 | 1996-05-07 | Florida Department Of Citrus | System and method for pasteurizing citrus juice using microwave energy |
US5972405A (en) * | 1997-10-10 | 1999-10-26 | Tetra Laval Holdings & Finance, Sa | Method for producing an aseptic heterogeneous food |
US5976592A (en) * | 1995-05-26 | 1999-11-02 | Officine Di Cartigliano S.P.A. | Method and apparatus for sterilizing biological liquids, particularly milk and its by-products |
US6010727A (en) * | 1997-12-31 | 2000-01-04 | Rosenthal; Richard A. | Actinic process for cold pasteurization of fresh foods and beverages |
US20020011487A1 (en) * | 2000-07-28 | 2002-01-31 | Masakazu Matsuo | Continuous flow type heating apparatus |
US6433320B2 (en) * | 1999-02-26 | 2002-08-13 | Nestec S.A. | On-demand microwave heating system and method |
US20040155034A1 (en) * | 2001-06-08 | 2004-08-12 | Lambert Feher | Continuous flow microwave heater |
US20060013927A1 (en) * | 2004-07-16 | 2006-01-19 | Geveke David J | Radio frequency electric field pasteurization system |
US20060093717A1 (en) * | 2003-02-14 | 2006-05-04 | Akkerman Jan C | Continuous thermal process for treating a flow comprising coarse food particles, and food particles obtainable with the process according to the invention |
US7270842B1 (en) * | 1999-11-12 | 2007-09-18 | North Carolina State University | Thermal gelation of foods and biomaterials using rapid heating |
Family Cites Families (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2833657A (en) * | 1954-01-08 | 1958-05-06 | Raytheon Mfg Co | Microwave irradiation of fruit juices |
GB2067390B (en) * | 1980-01-21 | 1984-12-19 | Electricity Council | Apparatus for heating electrically conductive flowable media |
GB2098040A (en) * | 1981-03-31 | 1982-11-10 | Sanyo Electric Co | System for and method of sterilization of food material |
US4534282A (en) | 1982-05-04 | 1985-08-13 | Marinoza Rene A | Process and apparatus for treating food products |
AU569777B2 (en) * | 1984-03-23 | 1988-02-18 | C.I.L. Inc. | Purification of waste sulphuric acid using microwave radiation |
US4601679A (en) * | 1985-05-16 | 1986-07-22 | Borg-Warner Corporation | Variable pulley torque drive means |
SE452086B (en) | 1986-03-03 | 1987-11-09 | Alfastar Ab | METHOD OF HEATING WITH MICROVAGOR |
WO1990003840A1 (en) * | 1988-10-10 | 1990-04-19 | Commonwealth Scientific And Industrial Research Organisation | Method and apparatus for continuous chemical reactions |
US5159564A (en) | 1988-12-22 | 1992-10-27 | North Carolina State University | Thermal memory cell and thermal system evaluation |
US5021981A (en) | 1988-12-22 | 1991-06-04 | North Carolina State University | Thermal memory cell and thermal system evaluation |
JPH04290410A (en) | 1991-03-19 | 1992-10-15 | Tokyo Electric Co Ltd | Electromagnetic apparatus |
KR940004005B1 (en) | 1991-11-28 | 1994-05-10 | 주식회사 금성사 | Microwave range |
US5290583A (en) * | 1992-04-02 | 1994-03-01 | David Reznik | Method of electroheating liquid egg and product thereof |
CA2093996C (en) | 1992-05-04 | 2005-01-11 | Bobby Earl Green | Microwaveable squeeze bottle for cheese sauce and the like |
US5309987A (en) | 1992-07-21 | 1994-05-10 | Astec | Method and apparatus for heating and cooling food products during processing |
DE4301124C2 (en) | 1993-01-18 | 1996-10-17 | Danfoss As | Method of connecting a cylinder liner to a base body |
JPH07123918A (en) | 1993-11-05 | 1995-05-16 | Mitsubishi Heavy Ind Ltd | Apparatus for heating oil and fat |
US5583960A (en) | 1994-06-01 | 1996-12-10 | David Reznik | Electroheating apparatus and methods |
JP3437270B2 (en) | 1994-07-21 | 2003-08-18 | キユーピー株式会社 | Oil-in-water emulsified food |
US5662031A (en) * | 1994-12-23 | 1997-09-02 | Washington State University Research Foundation, Inc. | Continuous flow electrical treatment of flowable food products |
US5697291A (en) * | 1995-05-15 | 1997-12-16 | Questron Inc. | Method and apparatus for microwave enhanced pasteurization and enzyme inactivation of continuously flowing product |
AUPN559595A0 (en) | 1995-09-22 | 1995-10-19 | Kodak (Australiasia) Proprietary Ltd. | Microwave heating apparatus |
US5876771A (en) | 1996-06-20 | 1999-03-02 | Tetra Laval Holdings & Finance, Sa | Process and article for determining the residence time of a food particle |
US5750907A (en) | 1996-06-20 | 1998-05-12 | Tetra Laval Holdings & Finance, S.A. | Process and article for determining the residence time of a food particle |
US5739437A (en) | 1996-06-20 | 1998-04-14 | Tetra Laval Holdings & Finance Sa | Process and article for determining the residence time of a food particle TRX-371 |
US5998774A (en) | 1997-03-07 | 1999-12-07 | Industrial Microwave Systems, Inc. | Electromagnetic exposure chamber for improved heating |
US5932813A (en) | 1997-10-07 | 1999-08-03 | North Carolina State University | Method and system for residence time measurement of simulated food particles in continuous thermal food processing and simulated food particles for use in same |
US6136015A (en) | 1998-08-25 | 2000-10-24 | Micrus Corporation | Vasoocclusive coil |
NL1010529C2 (en) * | 1998-11-11 | 2000-05-15 | Inst Voor Agrotech Onderzoek | Integrated modular construction of a pulsed electrical field system. |
US6246037B1 (en) | 1999-08-11 | 2001-06-12 | Industrial Microwave Systems, Inc. | Method and apparatus for electromagnetic exposure of planar or other materials |
AU4737501A (en) | 2000-03-10 | 2001-09-24 | Univ North Carolina State | Method and system for conservative evaluation, validation and monitoring of thermal processing |
CN1575622A (en) * | 2001-10-27 | 2005-02-02 | 米克罗热力有限公司 | Water heater |
US20030209542A1 (en) | 2002-05-13 | 2003-11-13 | Harris George M. | Apparatus and method for microwave processing of food products |
WO2004065911A2 (en) | 2003-01-16 | 2004-08-05 | North Carolina State University | Apparatus and method for controlling flow of process materials |
CA2513607C (en) | 2003-01-28 | 2016-12-13 | North Carolina State University | Methods, systems, and devices for evaluation of thermal treatment |
ITMI20040437A1 (en) | 2004-03-05 | 2004-06-05 | Sinteco Impianti S R L | EQUIPMENT FOR CONTINUOUS SURFACE PASTEURIZATION OF MEAT AND FOOD PRODUCTS IN GENERAL |
US9790539B2 (en) * | 2004-06-30 | 2017-10-17 | Russell Biotech, Inc. | Methods and reagents for improved selection of biological molecules |
US20060151533A1 (en) | 2004-11-12 | 2006-07-13 | Josip Simunovic | Methods and apparatuses for thermal treatment of foods and other biomaterials, and products obtained thereby |
ITBO20050704A1 (en) | 2005-11-22 | 2007-05-23 | Ali Spa | MACHINE FOR THE PRODUCTION AND DISTRIBUTION OF LIQUID AND SEMILEQUID CONSUMPTION FOOD PRODUCTS |
GB2457495A (en) * | 2008-02-15 | 2009-08-19 | E2V Tech | RF electromagnetic heating a dielectric fluid |
CA2735878A1 (en) * | 2008-09-11 | 2010-03-18 | Luna Innovations Incorporated | Method and apparatus for acoustically enhanced removal of bubbles from a fluid |
CA2762654C (en) | 2008-09-23 | 2017-11-14 | Aseptia, Inc. | Electromagnetic system |
JP5107278B2 (en) * | 2009-02-16 | 2012-12-26 | 株式会社日立製作所 | Microwave heating apparatus and heating method |
AU2010328312B2 (en) * | 2009-12-07 | 2013-06-27 | John F. Novak | Method and apparatus for microwave-based liquid vaporization system |
WO2015053234A1 (en) * | 2013-10-07 | 2015-04-16 | 第一高周波工業株式会社 | Device for producing ferromagnetic material microparticles |
-
2009
- 2009-09-20 CA CA2762654A patent/CA2762654C/en active Active
- 2009-09-20 PL PL09818234T patent/PL2343994T3/en unknown
- 2009-09-20 EP EP09818234.8A patent/EP2343994B1/en active Active
- 2009-09-20 US US13/120,615 patent/US9713340B2/en active Active
- 2009-09-20 WO PCT/US2009/057603 patent/WO2010039466A2/en active Application Filing
- 2009-09-20 ES ES09818234.8T patent/ES2534243T3/en active Active
- 2009-09-23 US US12/565,580 patent/US8337920B2/en active Active
- 2009-09-23 CA CA2758110A patent/CA2758110C/en active Active
- 2009-09-23 PL PL09818265T patent/PL2343983T3/en unknown
- 2009-09-23 WO PCT/US2009/057989 patent/WO2010039523A2/en active Application Filing
- 2009-09-23 EP EP09818265.2A patent/EP2343983B1/en active Active
- 2009-09-23 ES ES09818265.2T patent/ES2534244T3/en active Active
-
2012
- 2012-11-30 US US13/689,821 patent/US8574651B2/en active Active
-
2013
- 2013-10-01 US US14/042,825 patent/US9332781B2/en active Active
-
2015
- 2015-02-05 HR HRP20150147TT patent/HRP20150147T1/en unknown
- 2015-02-05 HR HRP20150148TT patent/HRP20150148T1/en unknown
-
2016
- 2016-03-08 US US15/064,126 patent/US10390550B2/en active Active
Patent Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3535482A (en) * | 1968-06-26 | 1970-10-20 | Hammtronics Systems Inc | Microwave apparatus for rapid heating of fluids |
US3577322A (en) * | 1968-12-03 | 1971-05-04 | Stephen J Nesbitt | Microwave heating in the desalination of water |
US3706631A (en) * | 1970-10-08 | 1972-12-19 | John D Falk | Sterilization of protein-containing fluids |
US3710063A (en) * | 1971-05-25 | 1973-01-09 | H Aine | Microwave applicator |
US3843860A (en) * | 1971-12-16 | 1974-10-22 | Varian Associates | Twisted microwave applicator |
US4237145A (en) * | 1978-02-03 | 1980-12-02 | Husqvarna Aktiebolag | Method of preparing foodstuffs containing coagulating proteins and a device for performing the method |
US4208806A (en) * | 1978-07-30 | 1980-06-24 | Gebrueder Buehler Ag | Process for treatment of pourable materials with microwaves |
US4284869A (en) * | 1980-03-06 | 1981-08-18 | Pinkstaff Leo W | Microwave water heater |
US4640840A (en) * | 1984-05-08 | 1987-02-03 | Thomas J. Lipton, Inc. | Food processing method to avoid non-enzymatic browning |
US4975246A (en) * | 1985-09-30 | 1990-12-04 | Charm Stanley E | High temperature, short time heating system and method of heating heat-sensitive material |
US5080164A (en) * | 1987-11-24 | 1992-01-14 | Stork Amsterdam B.V. | Process and device for heat treatment in continuous flow of a product mixture consisting of a liquid containing solid particulates |
US5403564A (en) * | 1993-05-05 | 1995-04-04 | Helmut Katschnig | Apparatus for heating and thermal decontaminating a pumpable or pourable material |
US5389335A (en) * | 1993-06-18 | 1995-02-14 | Charm Sciences, Inc. | High temperature, short time microwave heating system and method of heating heat-sensitive material |
US5514389A (en) * | 1994-10-13 | 1996-05-07 | Florida Department Of Citrus | System and method for pasteurizing citrus juice using microwave energy |
US5514389B1 (en) * | 1994-10-13 | 1998-06-02 | Florida Dept Of Citrus | System and method for pasteurizing citrus juice using microwave energy |
US5976592A (en) * | 1995-05-26 | 1999-11-02 | Officine Di Cartigliano S.P.A. | Method and apparatus for sterilizing biological liquids, particularly milk and its by-products |
US5972405A (en) * | 1997-10-10 | 1999-10-26 | Tetra Laval Holdings & Finance, Sa | Method for producing an aseptic heterogeneous food |
US6010727A (en) * | 1997-12-31 | 2000-01-04 | Rosenthal; Richard A. | Actinic process for cold pasteurization of fresh foods and beverages |
US6433320B2 (en) * | 1999-02-26 | 2002-08-13 | Nestec S.A. | On-demand microwave heating system and method |
US7270842B1 (en) * | 1999-11-12 | 2007-09-18 | North Carolina State University | Thermal gelation of foods and biomaterials using rapid heating |
US20020011487A1 (en) * | 2000-07-28 | 2002-01-31 | Masakazu Matsuo | Continuous flow type heating apparatus |
US6917022B2 (en) * | 2001-06-08 | 2005-07-12 | Forschungszentrum Karlsruhe Gmbh | Continuous flow microwave heater |
US20040155034A1 (en) * | 2001-06-08 | 2004-08-12 | Lambert Feher | Continuous flow microwave heater |
US20060093717A1 (en) * | 2003-02-14 | 2006-05-04 | Akkerman Jan C | Continuous thermal process for treating a flow comprising coarse food particles, and food particles obtainable with the process according to the invention |
US20060013927A1 (en) * | 2004-07-16 | 2006-01-19 | Geveke David J | Radio frequency electric field pasteurization system |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10334870B2 (en) | 2010-10-07 | 2019-07-02 | Tropicana Products, Inc. | Processing of whole fruits and vegetables, processing of side-stream ingredients of fruits and vegetables, and use of the processed fruits and vegetables in beverage and food products |
US20140322403A1 (en) * | 2011-12-07 | 2014-10-30 | Aseptia, Inc. | Processing and packaging of food products |
US10716435B2 (en) | 2011-12-07 | 2020-07-21 | HBC Holding Company, LLC | Processing and packaging of food products |
WO2013085508A3 (en) * | 2011-12-07 | 2015-06-04 | Aseptia, Inc. | Processing and packaging of food products |
US9622298B2 (en) | 2012-03-14 | 2017-04-11 | Microwave Materials Technologies, Inc. | Microwave launchers providing enhanced field uniformity |
US9980325B2 (en) | 2012-03-14 | 2018-05-22 | Microwave Materials Technologies, Inc. | Enhanced control of a microwave heating system |
US9271338B2 (en) | 2012-03-14 | 2016-02-23 | Microwave Materials Technologies, Inc. | Pressurized heating system with enhanced pressure locks |
US9301345B2 (en) | 2012-03-14 | 2016-03-29 | Microwave Materials Technologies, Inc. | Determination of a heating profile for a large-scale microwave heating system |
US9357590B2 (en) | 2012-03-14 | 2016-05-31 | Microwave Materials Technologies, Inc. | Microwave heating system with enhanced temperature control |
US9357589B2 (en) | 2012-03-14 | 2016-05-31 | Microwave Materials Technologies, Inc. | Commercial scale microwave heating system |
US9370052B2 (en) | 2012-03-14 | 2016-06-14 | Microwave Materials Technologies, Inc. | Optimized allocation of microwave power in multi-launcher systems |
US9380650B2 (en) | 2012-03-14 | 2016-06-28 | 915 Labs, LLC | Multi-line microwave heating system with optimized launcher configuration |
US10798790B2 (en) | 2012-03-14 | 2020-10-06 | Microwave Materials Technologies, Inc. | Enhanced microwave system utilizing tilted launchers |
US9642195B2 (en) | 2012-03-14 | 2017-05-02 | Microwave Materials Technologies, Inc. | Enhanced microwave system utilizing tilted launchers |
US9681500B2 (en) | 2012-03-14 | 2017-06-13 | Microwave Materials Technologies, Inc. | Enhanced microwave system employing inductive iris |
US9179505B2 (en) | 2012-03-14 | 2015-11-03 | Microwave Materials Technologies, Inc. | Optimized motion and location of intense microwave fields within a heating system |
US9066376B2 (en) | 2012-03-14 | 2015-06-23 | Microwave Materials Technologies, Inc. | Locking gate device |
US10448465B2 (en) | 2012-03-14 | 2019-10-15 | 915 Labs, LLC | Multi-line microwave heating system with optimized launcher configuration |
US10667546B2 (en) | 2013-02-15 | 2020-06-02 | Pepsico, Inc. | Preparation and incorporation of co-products into beverages to enhance nutrition and sensory attributes |
US20150044336A1 (en) * | 2013-08-06 | 2015-02-12 | Aseptia, Inc. | Processing of cranberry food product into aseptic packaging |
US10588326B2 (en) * | 2014-04-21 | 2020-03-17 | Tetra Laval Holdings & Finance S.A. | Use of electromagnetic energy for making pasta filata cheese |
US20150296825A1 (en) * | 2014-04-21 | 2015-10-22 | Johnson Industries International, Inc. | Use of electromagnetic energy for making pasta filata cheese |
US11032879B2 (en) | 2017-03-15 | 2021-06-08 | 915 Labs, Inc. | Energy control elements for improved microwave heating of packaged articles |
US11129243B2 (en) | 2017-03-15 | 2021-09-21 | 915 Labs, Inc. | Multi-pass microwave heating system |
US10966293B2 (en) | 2017-04-17 | 2021-03-30 | 915 Labs, LLC | Microwave-assisted sterilization and pasteurization system using synergistic packaging, carrier and launcher configurations |
US20210204570A1 (en) * | 2017-12-26 | 2021-07-08 | Puratos N.V. | Methods for heating compositions comprising edible inclusions |
US11723388B2 (en) * | 2017-12-26 | 2023-08-15 | Puratos Nv | Methods for heating compositions comprising edible inclusions |
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US8574651B2 (en) | 2013-11-05 |
US20160324195A1 (en) | 2016-11-10 |
EP2343983A4 (en) | 2012-04-18 |
US10390550B2 (en) | 2019-08-27 |
PL2343983T3 (en) | 2015-08-31 |
EP2343994B1 (en) | 2014-11-05 |
CA2758110C (en) | 2016-01-05 |
EP2343994A2 (en) | 2011-07-20 |
HRP20150147T1 (en) | 2015-05-08 |
US9332781B2 (en) | 2016-05-10 |
ES2534243T3 (en) | 2015-04-20 |
CA2762654C (en) | 2017-11-14 |
US20110174385A1 (en) | 2011-07-21 |
WO2010039523A9 (en) | 2010-08-26 |
WO2010039466A2 (en) | 2010-04-08 |
US20140030398A1 (en) | 2014-01-30 |
WO2010039466A3 (en) | 2010-07-01 |
CA2758110A1 (en) | 2010-04-08 |
EP2343983B1 (en) | 2014-11-05 |
HRP20150148T1 (en) | 2015-06-19 |
US8337920B2 (en) | 2012-12-25 |
EP2343983A2 (en) | 2011-07-20 |
US20130122160A1 (en) | 2013-05-16 |
WO2010039523A3 (en) | 2010-07-08 |
US9713340B2 (en) | 2017-07-25 |
CA2762654A1 (en) | 2010-04-08 |
PL2343994T3 (en) | 2015-06-30 |
ES2534244T3 (en) | 2015-04-20 |
EP2343994A4 (en) | 2012-04-25 |
WO2010039523A2 (en) | 2010-04-08 |
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